Conduit connection for compressors



7, 1933. F D PELTIER 7 1,900,661

' CONDUIT CONNECTION FOR GOMPRESSORS Filed Feb. 18, 1950 INVENTOR. ialvvg 10. 7 p

BY I N v ZWJWW 4 TTORNEYS.

Patented Mar. 7, 1933 UNITED STATES PAT N OFFICE FRANK D. PELTIER, OF EVANSVIDLE, INDIANA, ASSIGINOR, BY MESNE ASSIGNMENTS,

TO SERVE-L, IIfl'Q, OF NEW YORK, N. Y., CORPORATION OF DELAWARE connnrn connno'molv .roii. oonraiis'sons" Application filed February 18', 1931). Serial no; 429,280.

This invention relates to conduit connections for compressors, pumps and the like, and more particularly to connections for compressors which havevalves associated '5 therewith, such as are used on the return side in mechanical refrigerating systems of the domestic variety. v V

The invention has for its object generally, an improved connection of the character indicated which is efficient, economical and readily manufactured.

Mo-res'pecifically, an object is to provide an improved connection of the character indicated which includes a valve so disposed that a fluid-tight assembly may be accomplished with substantially a minimum number of joints.

g A further object is to provide a return connection for compressors which houses. a

removable check-valve and involves the use of but one packing gland.

A; still further object is to provide an arrangement which will utilize a packing gland arranged, both to seal the check-valve in place and to pack the connecting member proper in place and which may be readily assembled and serviced in a relatively small space.

Other ob ects of the invention will in part be obvious and will in part appear'hereinafter.

The invention accordingly comprises the features of construction, combination of elements, and arrangement of parts, which will be exemplified in the constructions hereinafter set forth and the scope of the application of which will be indicatedin the claim.

For a fuller understanding of the nature and objects of the invention, reference should be had to the following detailed description taken in connection with the accompanying drawing, in which:

Fig. 1 is a fragmentary vertical sectional view through a compressor of the rotary variety arranged to be driven by an electric motor (a' portion .of the motor casing being broken away) and provided with a return connection constructed in accordance with the present invention; 7

Fig. 2 is an enlarged detailed sectional view of the return connection shown in Fig. 1;

Fig. 3 is a fragmentary view, partly in section and partly in elevation of the return connection, the plane of the section being on the line 3--3 in Fig. 2; and Y Figs. 4:- and 5 are detailed sectional views of the valve structure shown in Fig. 2.

Referring now to the drawing, and par-- ticularly to Figs. 1 and 3,10 denotes a motor 0 casing having a rotor 11 therein disposed for driving through the shaft 12, one end of. which is shown as journalled in theeentre drive plate 13, which closes the motor-casing and serves as a support for a compressor casing 14 here shown as secured to the rim of the centre drive plate 13'.

Within the casing 14 is a compressor preferably of the rotary variety as shown mounted on the centre drive plate 13 and provided 79 with a driving sl'i'aft 16 that projects into the journal opening in the centre drive plate 13 and engages with the' end of the rotor shaft 12', so that driving torque may be transmitted therethrough to the compressor 15. The compressor has an outlet 17 discharged into the casing 14, the latter being provided With'a discharge opening 18 near its top. The inlet for the compressor is shown as a passage 19 in the centre drive plate, the upper end 20 of which communicates directly with the compressor. p The lower end of the passage 19 is enlarged and is arranged to receivethe return connection of the present invention and its associated valve. To this end, the passage 19 has acounter-bored cylindrical chamber 21 which preferably has" a groove 22 at its outer end in orderto provide means for secu'ring the valve assembly in place the valve assembly here being shown as comprising a sleeve 23 provided with a flange or collar 24 which is adapted to'engage with the groove so as tobe held in proper position with reference to the passage opening. The sleeve 23 is preferably of a generally cylindrical character and has its collar'24 extending'outwardly from the middle'porti'on of its outer surface. The lower end of the sleeve is arranged to depend slightly into the cylindrical ch her 21, and serves as a boss for guiding and positioning the connecting member proper, here shown as a nipple at 25 having an upwardly extending cylindrical boss 26 which 5 fits slidingly over the depending end of the valve sleeve 23. I

In order that this boss may seal both the valve and the connecting member in the wall of the chamber 21 at the same time, the chamher 21 has a further groove 27 counterbored therein of larger diameter than the groove 22, the end wall of this second groove 27 being arranged to be flush with the lower side of the flange 2 on the sleeve 23. An annular packing member 28 is slipped over the depending end of the sleeve 23 and is made to fit snugly against the shoulder of the groove 2'7, as well as the side of the flange 24. Abutting against the lower side of this packing 9 member, is the top of the boss 26 of the coupling member 25. 1

I Inorder that this packing member may be compressed and held in engagement with the walls of the chamber 21, soas to make a single tight oint, the coupling member is'arranged to be secured understressand at? tached so as to be drawn up against the packing member, it being preferable to drawthe same into place Without the use of parts in- 39 volving the turning of the member 25. In

accomplishing this attachment, it is seen that the parts of the member 25 which engage with the walls of the chamber 21 are all plain cylindrical walls without" screw-threads.

.5 Securing means are provided in the form of lugs 30 and 31 which extend laterally from the sides of the coupling'member 25, these lugs having openings respectively at 32 and 33 for the reception of bolts 34 and 35 which 4. pass upwardly through theseopeningsand have screw-threaded engagement as indicated at36 and 37 with suitable screw-threaded sockets formed at each side of the passage 19 in the centre wall 13. Thus, it is seen that .45 the centre drive plate serves as a wall supporting the coupling member in a rigid manner without the use of any screw-threaded parts directly on the coupling member 25. Hence, the parts may be readily slipped 59 into place, the bolts 34 and 35 first being 5.5 of tight screw-threaded fittings in the inlet opening to the compressor. I I

The valve member disposed in the return connection serves as a check-valve and may have a valve, which seats downwardly, of

0 any suitable variety, for example, a semi-ball valve as here shown at 38 that is adapted to engage with a seat 39 formed in the upper end of the sleeve 23. I The valve 38 is also provided with a depending guiding member which may be of any suitable form, for

example, a sliding tongue having a triangular cross section as shown in Figs. 4 and 5 respectively. The tongue serves not only to keep the valve in proper alignment when moving downwardly to engage wit-h its seat, but serves also as a gravityactuating member to insure the return of the valve to its seat upon cessation of flow after having been forced therefrom by the passage of returning refrigerant or other fiuid to the.com-' pressor 15. a

The coupling member 25 used in conjunction" with the present invention, is seen to have an engagingboss as shown at 26, and lugs forsecuring the same to the wall on the sides of theinlet passage 19. Aside from these features, the return connectionmay have any convenient'form, andis here shown as an elbow connection provided with a screw threaded orificehwith which return pipe connections, as indicated at 4:2 in Fig. 1, may engage. I I

In operation, it is seen that the coupling of the present invention occupies a relatively small amount of space, is attached and detached without turningthe same relative to the casing on which it is secured, makes use of but a single packing joint which also seals a return or check-valve in the casing, and is readily attached to and detached from the compressor, both in a factory assemblyoperation and in a repair operation when servicing the device. I

Since certain changes may be made in the above construction and different embodiments of the invention could be made without departing from the scope thereof, it is intended that all matter contained in the above description or shown in .the accompanyingdrawing, shall be interpreted as illustrative and not in a limiting sense. I

Having'described my invention, what I claim as new and desire to secure by Letters Patent, is: I

. In a connectingdevice of the character described, the combination with a securing wall formed with a return passage therein having a receiving chamber and a pair of grooves-in stepped relation about the outer end ofs'aidchamber, of a valve member com prising a flanged sleeve having a collar disposed to fit into the innermost of said grooves and a fiuid-actuated valve disposed" therein, a packing member disposed in the outermost of said grooves and disposed to close the,

joint between said collar and its groove, an elbow coupling having a boss adapted to fit slidingly over said sleeve and provided with lugs extending laterally from the elbow, and tension memb said lugs and with said wall member to draw the boss of said coupling into tight engagement with said packing member.

In testimony whereof I aiiix my signature.

FRANK D. PELTIER ers adapted to engage with' 

